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Vishay General Semiconductor - Diodes Division 1N6294-E3/54
- Part No.:
- 1N6294-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6294-E3/54.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,336
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Product details
Overview
1N6294-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in the 1.5KE family, designed for primary overvoltage protection of DC power rails and signal lines. It features a breakdown voltage range of 86.5 V to 95.5 V at 1.0 mA test current, clamps transients to ≤125 V at 12.0 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used in automotive power supply input stages and industrial PLC I/O modules.
For engineers reviewing the 1N6294-E3/54 datasheet, 1N6294-E3/54 pinout, 1N6294-E3/54 application, or 1N6294-E3/54 equivalent, this page provides verified electrical parameters, package dimensions, clamping behavior under surge conditions, thermal derating curves, and direct alternatives for ESD/lightning transient suppression in 24 V–48 V systems.
Technical Context
The 1N6294-E3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response to voltage transients. Its unidirectional polarity uses a cathode band marking, and it complies with JEDEC standard 1.5KE case style for axial-lead mounting.
It is rated for 175 °C maximum junction temperature, exhibits 75 °C/W junction-to-ambient thermal resistance, and supports 200 A non-repetitive forward surge current (8.3 ms half-sine). The device maintains stable clamping performance across -55 °C to +175 °C operating range without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 86.5 V / 95.5 V at 1.0 mA - defines minimum guaranteed clamping initiation threshold and maximum variation across production lot |
| VWM | 77.8 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 125 V at 12.0 A - peak clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak transient power absorption capability, critical for lightning surge immunity per IEC 61000-4-5 |
| IFSM | 200 A - single-cycle surge current rating, supporting high-energy inductive switch-off events |
| TJ max | +175 °C - enables operation in under-hood automotive or enclosed industrial enclosures without forced cooling |
| RθJA | 75 °C/W - thermal resistance defining required heatsinking for sustained 6.5 W power dissipation |
Pinout & Package
Package: Axial-leaded DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated leads; RoHS-compliant per JESD 201 Class 1A whisker test; 0.375" (9.5 mm) lead length, 0.210"–0.285" body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 24 V rail); conducts when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable VBR drift < ±5 % over 1000 hrs at 85 °C/85 % RH |
| 1500 W peak pulse power (10/1000 µs) | Meets Level 4 IEC 61000-4-5 surge immunity for industrial equipment with 2 Ω source impedance |
| Sub-nanosecond response time | Clamps transients before sensitive logic or analog circuitry experiences overstress (tr < 1 ns) |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising surges (e.g., EFT bursts), improving protection margin |
| UL 94 V-0 compliant molding compound | Prevents flame propagation in safety-critical enclosures per UL 60950-1 and UL 62368-1 |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump (ISO 16750-2) and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping device placed between power rail and bulk capacitor, absorbing >100 J energy pulses. Use Value: Limits rail voltage to ≤125 V during 120 V/100 ms load dump, preventing damage to 36 V-rated DC-DC controllers and CAN transceivers. | Use Scenario: 24 V digital input channels on programmable logic controllers subject to field-wiring induced transients. IC Role / Device Role / Timing Role: Front-end transient suppressor mounted directly at terminal block, shunting surge current before optocoupler input stage. Use Value: Clamps 1 kV/500 A surge (IEC 61000-4-5) to safe levels (<150 V), preserving optocoupler CTR and extending channel lifetime beyond 100,000 operations. |
| Telecom DC Power Feeds | Motor Drive Control Signal Lines |
Use Scenario: -48 V DC power distribution in central office equipment vulnerable to lightning-induced surges on outside plant lines. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamping backup for fast-rising transients. Use Value: Delivers 125 V clamping at 12 A, reducing residual voltage seen by downstream DC-DC converters and protecting -48 V supervisor ICs. | Use Scenario: 5 V/3.3 V encoder feedback and enable signals routed near high-current motor phases. IC Role / Device Role / Timing Role: Point-of-use TVS on PCB edge connectors, placed within 2 mm of mating interface. Use Value: Suppresses 500 V/10 A inductive kickback (per IEC 61800-3) before it couples into microcontroller GPIOs, eliminating false triggering and latch-up events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A | DO-214AA package, 85 V VWM, 135 V VC @ 11.1 A, 600 W PPPM | Lower power rating; suited for space-constrained PCBs where 1500 W is not required | Select SMBJ85A when board area is limited and surge threat level is defined as IEC 61000-4-5 Level 3 (1 kV/42 Ω) |
| 1.5KE91A | Same 1.5KE package, identical VBR/VC specs, but E3/54 suffix denotes tape-and-reel packaging vs. bulk/heatsink variants | No functional difference; differs only in packaging format and reel quantity (1400 pcs/reel) | Choose 1.5KE91A for manual assembly or small-batch prototyping where tape-and-reel is unnecessary |
Compared with 1N6294-E3/54, SMBJ85A offers smaller footprint but reduced surge handling, while 1.5KE91A is electrically identical but supplied in alternate packaging - making the former suitable for compact designs and the latter for cost-sensitive high-volume SMT lines requiring different logistics.
Availability
1N6294-E3/54 is available at Aetrix Electronics and suitable for automotive power input protection, industrial PLC digital I/O protection, and telecom DC power feed applications requiring stable component supply, consistent parametric performance, and full traceability from Vishay's certified manufacturing line.
Supply support for 1N6294-E3/54 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, ruggedness, and AEC-Q101 qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial control, and telecom infrastructure where failure modes must be mitigated without compromising long-term stability.
FAQ
What is the breakdown voltage tolerance of the 1N6294-E3/54?
The 1N6294-E3/54 has a specified breakdown voltage range of 86.5 V to 95.5 V at 1.0 mA test current, representing a ±5.5 % tolerance around the nominal 91 V rating. This tolerance is measured per JEDEC standard and applies across the full operating temperature range of -55 °C to +175 °C, ensuring predictable clamping behavior in both cold-start and under-hood thermal conditions. The 1N6294-E3/54 maintains this specification without binning or sorting.
Does the 1N6294-E3/54 meet AEC-Q101 qualification?
No, the 1N6294-E3/54 is not AEC-Q101 qualified. Per Vishay documentation, AEC-Q101 qualification applies only to parts with HE3 suffix (e.g., 1.5KE91AHE3_B), not the E3/54 commercial-grade variant. The 1N6294-E3/54 meets commercial reliability standards including JESD 22-B106 solder dip and JESD 201 Class 1A whisker testing, but automotive-grade validation requires explicit HE3 marking and associated qualification reports.
What is the maximum clamping voltage of the 1N6294-E3/54 under surge conditions?
The maximum clamping voltage of the 1N6294-E3/54 is 125 V, measured at 12.0 A peak pulse current using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across all units and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events. The 1N6294-E3/54 achieves this clamping performance with minimal overshoot due to its low incremental surge resistance and sub-nanosecond response.
Can the 1N6294-E3/54 be used in bidirectional configurations?
No, the 1N6294-E3/54 is strictly a unidirectional TVS diode. Its cathode band marking and electrical specifications (e.g., VF = 3.5 V at 100 A) confirm asymmetric conduction. For bidirectional protection at ~91 V standoff, the correct part is 1N6294CA or 1.5KE91CA - which feature symmetrical breakdown in both polarities and no polarity marking. Using 1N6294-E3/54 in bidirectional circuits risks catastrophic failure during positive transients.
What is the thermal resistance and power derating behavior of the 1N6294-E3/54?
The 1N6294-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a maximum power dissipation (PD) of 6.5 W at TL = 75 °C on infinite heatsink. Derating begins linearly above 25 °C ambient: power capability reduces by 54 mW/°C, reaching zero at 175 °C junction temperature. This derating curve is validated per Figure 5 in Vishay document 88301 and applies to both continuous and repetitive surge conditions when average power exceeds 100 mW.
1N6294-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 11.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6294-E3/54 FAQ
1.How can I place an order for 1N6294-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6294-E3/54 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N6294-E3/54 reliable?
The price and inventory of 1N6294-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6294-E3/54 is usually 5 days.
3.What payment methods are accepted for 1N6294-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6294-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6294-E3/54?
1N6294-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6294-E3/54 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N6294-E3/54?
For technical support, including 1N6294-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6294-E3/54 requirements.
6.How does Aetrix verify that 1N6294-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1N6294-E3/54 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N6294-E3/54 meets industry standards.
7.What is the process for return or replacement of 1N6294-E3/54?
All 1N6294-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6294-E3/54, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N6294-E3/54 part is unused and in its original packaging.
Return procedure for 1N6294-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6294-E3/54 Tags
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